Small-Size Downhole Air Drill Hammers of Increased Capacity
A. A. REPIN1, V. V. TIMONIN1, S. E. ALEKSEEV1, D. I. KOKOULIN1, A. I. POPELYUKH2
1Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
2Novosibirsk State Technical University, pr. K. Marksa 20, Novosibirsk, 630092 Russia
Keywords: бурение, пневмоударник, мощность, рабочая площадь, термообработка, титановые сплавы, цементация, drilling, air drill hammer, capacity, effective area, thermal treatment, titnium alloys, cementation
Abstract
Authors review key approaches to designing small-size air drill hammers. The approach to increasing impact capacity of air drill hammers by means of buildup of blow frequency is substantiated. The experimentally obtained and compared characteristics of air drill hammers equipped with the heads made of steel and titanium prove feasibility of increasing impact capacity by means of using low density materials. The technology of thermal treatment of a titanium-alloy hammer head is described, and its laboratory testing results are reported.
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